Base62 (original) (raw)

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Encoding for a sequence of byte values using 62 printable characters

Base62 is a binary-to-text encoding that represents arbitrary data (including binary data) as ASCII text. It encodes data as the 62 letters and digits of ASCII – capital letters A-Z, lower case letters a-z and digits 0–9.[1][2]

123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz = 58 characters = base58

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz = 62 characters = base62

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz+/ = 64 characters = base64

The Base62 alphabet:

| Value | Char | | Value | Char | | Value | Char | | Value | Char | | ----- | ---- | -- | ----- | ---- | - | ----- | ---- | | ----- | ---- | | 0 | 0 | 16 | G | 32 | W | 48 | m | | | | | 1 | 1 | 17 | H | 33 | X | 49 | n | | | | | 2 | 2 | 18 | I | 34 | Y | 50 | o | | | | | 3 | 3 | 19 | J | 35 | Z | 51 | p | | | | | 4 | 4 | 20 | K | 36 | a | 52 | q | | | | | 5 | 5 | 21 | L | 37 | b | 53 | r | | | | | 6 | 6 | 22 | M | 38 | c | 54 | s | | | | | 7 | 7 | 23 | N | 39 | d | 55 | t | | | | | 8 | 8 | 24 | O | 40 | e | 56 | u | | | | | 9 | 9 | 25 | P | 41 | f | 57 | v | | | | | 10 | A | 26 | Q | 42 | g | 58 | w | | | | | 11 | B | 27 | R | 43 | h | 59 | x | | | | | 12 | C | 28 | S | 44 | i | 60 | y | | | | | 13 | D | 29 | T | 45 | j | 61 | z | | | | | 14 | E | 30 | U | 46 | k | | | | | | | 15 | F | 31 | V | 47 | l | | | | | |

  1. ^ Kejing He; Xiancheng Xu; Qiang Yue (November 19, 2008). "A secure, lossless, and compressed Base62 encoding". 2008 11th IEEE Singapore International Conference on Communication Systems. Institute of Electrical and Electronics Engineers. pp. 761–765. doi:10.1109/ICCS.2008.4737287. ISBN 978-1-4244-2423-8. S2CID 10831128. This base62 compressed encoding has been tested & The 62 alphanumeric characters (A-Z, a-z, 0–9)
  2. ^ Wu, Pei-Chi (June 18, 2001). "A base62 transformation format of ISO 10646 for multilingual identifiers". Software: Practice and Experience. 31 (12): 1125–1130. doi:10.1002/spe.408. S2CID 32472727. Retrieved August 13, 2020. within a [0–9][A–Z][a–z] range, a total of 62 base characters